Volume 18, Issue 1 (International Journal of Engineering 2007)                   IJIEPR 2007, 18(1): 1-5 | Back to browse issues page

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1- , aghajani@iust.ac.ir
Abstract:   (6060 Views)

Abstract: This paper investigates the problem of whether all trajectories of the system and cross the vertical isocline, which is very important for the existence of periodic solutions and oscillation theory. Sufficient conditions are given for all trajectories to cross the vertical isocline.


Type of Study: Research | Subject: Material Managment
Received: 2009/04/20